package com.atguigu.wxlogin.controller;


import com.atguigu.commonutils.utils.JwtUtils;
import com.atguigu.servicebase.handler.GuliException;
import com.atguigu.wxlogin.entity.UcenterMember;
import com.atguigu.wxlogin.utils.ConstantPropertiesUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.google.gson.Gson;
import io.swagger.annotations.Api;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpSession;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;

/**
 * <p>
 * 会员表 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2022-04-10
 */
@Api(description = "微信登录")
@Controller
@RequestMapping("/api/ucenter/wx")
//@CrossOrigin
public class UcenterMemberController {

    @GetMapping("login")
    public String genQrConnect(HttpSession session) {

        // 微信开放平台授权baseUrl
        /*
        * https://open.weixin.qq.com/connect/qrconnect?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect
        *
        *
        * */
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        // 回调地址
        String redirectUrl = ConstantPropertiesUtil.WX_OPEN_REDIRECT_URL; //获取业务服务器重定向地址
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "UTF-8"); //url编码
        } catch (UnsupportedEncodingException e) {
            throw new GuliException(20001, e.getMessage());
        }

        // 防止csrf攻击（跨站请求伪造攻击）
        //String state = UUID.randomUUID().toString().replaceAll("-", "");//一般情况下会使用一个随机数
        String state = "atguiguwxlogin";//为了让大家能够使用我搭建的外网的微信回调跳转服务器，这里填写你在ngrok的前置域名
//        System.out.println("state = " + state);

        // 采用redis等进行缓存state 使用sessionId为key 30分钟后过期，可配置
        //键："wechar-open-state-" + httpServletRequest.getSession().getId()
        //值：state
        //过期时间：30分钟

        //生成qrcodeUrl
        String qrcodeUrl = String.format(
                baseUrl,
                ConstantPropertiesUtil.WX_OPEN_APP_ID,
                redirectUrl,
                state);

        return "redirect:" + qrcodeUrl;
    }

//    @GetMapping("callback")
//    public String callback(String code, String state){
//        //1获取参数code，临时票据
//        System.out.println("code="+code);
//        System.out.println("state="+state);
//
//        //2拿code，换取access_token、openid
//        String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
//                "?appid=%s" +
//                "&secret=%s" +
//                "&code=%s" +
//                "&grant_type=authorization_code";
//
//        String accessTokenUrl = String.format(baseAccessTokenUrl,
//                ConstantPropertiesUtil.WX_OPEN_APP_ID,
//                ConstantPropertiesUtil.WX_OPEN_APP_SECRET,
//                code);
//        String result = null;
//        try {
//            result =  HttpClientUtils.get(accessTokenUrl);
//            System.out.println("result="+result);
//
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//        //2.1解析json
//        Gson gson = new Gson();
//        HashMap map = gson.fromJson(result, HashMap.class);
//        String accessToken = (String)map.get("access_token");
//        String openid = (String)map.get("openid");
//
//        //3 换取用户信息
//        //访问微信的资源服务器，获取用户信息
//        String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
//                "?access_token=%s" +
//                "&openid=%s";
//        String userInfoUrl = String.format(baseUserInfoUrl, accessToken, openid);
//        String resultUserInfo = null;
//        try {
//            resultUserInfo =  HttpClientUtils.get(userInfoUrl);
//            System.out.println("resultUserInfo="+resultUserInfo);
//
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//        //3.1解析json
//        HashMap userMap = gson.fromJson(resultUserInfo, HashMap.class);
//        String nickname = (String)userMap.get("nickname");
//        String headimgurl = (String)userMap.get("headimgurl");
//
//        //4根据openid查询用户
//        QueryWrapper<UcenterMember> queryWrapper = new QueryWrapper<>();
//        queryWrapper.eq("openid",openid);
//        UcenterMember member = memberService.getOne(queryWrapper);
//        //5判断用户是否存在，用户不存在，走注册
//        if(member==null){
//            member = new UcenterMember();
//            member.setNickname(nickname);
//            member.setAvatar(headimgurl);
//            member.setOpenid(openid);
//            memberService.save(member);
//        }
//        String token = JwtUtils.getJwtToken(member.getId(),member.getNickname());
//
//        return "redirect:http://localhost:3000?token="+token;
//    }
}

